Dayton



H. w. KIMES'.

AUTOMATIC CUT-OUT FOR ELECTRIC MOTORS.

APPLxcA-T|oN HLEn1uNE16,19|5.

Patented Aug. 22, 1916.

,HM/gh Wil-Lma@ Elttozmuff/ nuen w, Kinases navromonro, assronon To THE vaILE-Krmns COMPANY, or' DAYTON, CHIC, a CORPORATION or CHIC. y

AUTOMATIC Cnr-CUT rca ELECTRIC morons.

mmv

Specrcatonof Letters Patent.

Patented Aug. 22, 1916.

^ appiicationiearuneie,1915; semaine. 34,494.

To ail whom t may concern:

Be it known that I, HUGH KrMn-s, a

citizen of the United States,; residing at Dayton,-in .the County of Montgomery and State of-Ohio; have invented certain new and useful Improvements in Automatic Cut- Outs for Electric Motors, of'which the' following is a specification, reference being had therein to the accompanying drawing.

This invention relates to automatic cutouts for electrical motors and more particularly to a pressure Controlled cut-out for the motor of a pump used in connection with 1 a' water distribution system in which the water lis stored in a tank under air pressure, which pressure serves to distribute the same through the system;

.Theobject of .he'invention is to provide eratingcntact -member so that there will be little ori nosparking' and no burning of the contacts., l. It is-alsoyan objecttof the invention to providea ,device oftthis kind which will be "simple -inits construction and operation,

thereby enabling it to be manufactured and j marketedat a comparatively low cost and simplifying the' upkeep of the same.

In the, accompanying drawings, Figure 1 Ais a. side elevation of a 'device embodying my .-invention-; Fig. 2 is avertical sectional view '-ofthe same taken just inside one of the Aframe members; Fig.. 3 is an end elevation showingthe conta'ctmembers, partially broken away to 'show the stops; and Fig. 4 is ,an elvationof that` en d of the device oppo- .site,that.sho wn inFigS, partially broken away.and showing the controlling lever.

In these drawings Ihave illustrated one embodiment of my invention and `have shown the same as comprising a base 1 having therein a chamber" comprising a 'xed lower wall 2 and a flexible upper wall 3, which constitutes a diaphragm. `This chamber is connected by means' of a conduit 4 with the pressure tank sothat the diaphragm is subjected at all times to the pressure of the air within the tank. Rigidly sesecuredto the base and extending upwardly therefrom are two frame members 5 con- .nected at their upper ends by a cross member 6. In the present instance the frame members and base are cast' integral but obviously they may. be united in'any suitable manner. Arranged between the side members' of the frame isa plunger 7 having at its lower end an enlarged portion or' base 8 base 1 'of the frame and'rests upon the dia- .'phragm. Ihe upper; end. of' this plunger extendsthrough an opening in the top member 6 of the frame.v Coiled about the plun# -ger is a spring 10 which is confined between.

of the plunger until the pressure in the tankand in the chamber beneath the diaphragm 3 reaches' a certain predetermined point. Then the pressure exceeds this predeterf mined point the spring will yield and permit the' plunger to move upward .and it will be retained in its upper position until the pressure falls sufficiently lto permit the spring to move the plungerdownward.

Mounted upon the frame are suitable 'contact members, and, in-the present instance, we have' shown these Contact members as comprising a pair of `fixed contacts. 13 mountedon a block of insulating material 14, which is'secured" to the frame of the device, and having binding posts 15v by means of which they'maybe connected in an elec- `which extends through-an opening-9 inthe engage 'the' respective fixed Contact members.- Preferably, the several contact memj bers are provided with Contact points 17.

A 'suitable actuating device is provided for moving the movable Contact member 16 into and out of engagement with the fixed conioo tact member and, in the present arrangement of the mechanism, the movablepontact member is secured to and carried by this actuating device. This, however, is an optional arrangement. As here illustrated the actuating device comprises an arm 18 pivotally mounted "on studs 19 at the upper corner of thev frame opposite the plug 12. This arm is provided with a depending portion 2O to which `is secured a .bloc 1 of insulating material, to which, in turn, is secured the movable contact member 16. Movably mounted uponthe frame and operatively connected with the plunger 7 is a controlling device by means of which the actuating device for the movable contact is caused to move that member in a direction to make or break the circuit as may be required by Jthe condition of the pressure in the tank. As

here shown, this controlling. device vcom-- prises a bifurcated lever 22 having its arms straddling the plunger 7 and pivotally connected to the lower corner of the frame, diagonally opposite the axisof the 'actuating device 18. The arms of the controlling member are connected one to the other at a point remote from the axis of that-member and the end of the controlling member is arranged to coperate with the actuating device, as will be hereinafter explained. The controlling device may be connected with the plunger in any suitablemanner. In the present instance it is provided with a projection or lip 23 extending into'a slot 24 in the lower portion of the plunger and preferably provided with an antifriction roller 25 which engages the walls of the slot. Thus, it will be apparent that the rising and falling movement of the plunger will be transmitted to the controlling lever. The movement of the controlling lever is limited by means of stops 26,and 27 ar ranged below and above,A respectively, the free end ofthe lever and preferably c'ast integral with one of the side members of the main frame'. As has been stated the actuating device and the controlling device cooperate to cause the movement of the movable contact member and one of these devices, preferably the actuating device, is provided with a yieldable part lhaving converging surfaces adapted to engage'diiferent portions of the other device, 1n the present instance, the controlling device, as the controlling device is moved into different positions. This yieldable part of the ac` tuating device is so arranged with relation to the axis ofl that device that when one of its surfaces is in engagement with the controlling device the actuating device will be moved in one direction and held against movement in the other direction until the controlling device has changed its position so as to permit the other surface of the yieldable part of the device to engagevthe same. The engagement of this second surface of the yieldable part with the controlpivotally connected one end of a lever 25.2* i

which extends transversely to the arm and has a tapered nose 30, the converging sides or surfaces of which'etend beyond the lower edge of the arm, which is bifurcated to ceive the lever. The arm is provided with a.

radially extending socket or recess in which is mounted a spring 33 which is confined between the end of the socket and the arm 29 and serves to hold the ,nose 30 yieldably inengage'ment with the end of the controlling lever. The apex of this tapered nose is arranged parallel with the aXes'of the arms and the tapered surfaces thereof are arranged on oppositesides of a line extending through'the axis of the actuating4 arm and the controlling lever. The upper end of the controlling lever is so arranged with relation to this line that it will move from one side to the other thereof. The spring 33 is also arranged to exert its force and to be compressed 'in a direction extending substantially lengthwise of this line, as shown.

Further, the'- tapered nose is so arranged with relation to the end of the lever that it will bear constantly upon the same. lilith the .parts in the positions shown in Fig. 2 the circuit is broken and the l-hressme under thel diaphragm is holding the plunger and the controlling device in their uppermost positions. As soon as this pressure falls below.

`a predetermined point the controlling lever will begin 'to move downward, that is, to-

^ ward the stop 26; As it moves it will force the yieldable part 30 of the actuating device toward the axis of that device but the pressure will be in a direction. to hold the device in its present position against the stop 26 with which it engages, as will be described, with the contacts separated. The instant the end of the controlling lever passes the apex of the tapered nose the other surface of the latter will engage the end of the controlling lever and the pressure will be 'in a direction to move the actuating arm about its axis in a direction to close the contacts. lt 'will be noticed that either one .side or the other of the nose 30 will exert a pres-- sure against the end of the lever 22 according to the position of the lever, this pressure being due to the compression of the spring 33. This results in the nose being cammed to one .side or the other, acA4 cordingly carrying with it the pivoted arm to which it is attached. lt will be noted that this movement of the actuating lits outer end withy a roller 31 with which the tapered nose 30 of the actuating arm engages and which has not only the usual functions v of an anti-friction roller but also serves to prevent the lapex of the nose from hanging on the end of the roller. The actuating device or arm is provided with a laterally' eX- .tending stop 32 which is arranged between and. cooperates with the stops 26 'and 27 to limit the movement of the actuating device about its axis and to hold the same immovable during the compression of the spring 33 and the initial movement of the controlling device. Preferably, .the apparatus as a 'whole is inclosed in a cylindrical casing 34 which is removably mounted on the base 1. The operation of the apparatus will be vfully understood from the Lforegoing description and it will be apparent that the operation of the movable contact member is quick and positive. As the controlling device moves from one position to another the actuating device is not moved but is retained in its position until the controlling vldevice passes a central point and then the 30 same to move about its pivotal center and spring of the actuating device causes the thus impart movement to the contact member. Further, the device is very simple in its operation and in its construction. Consequently, it is not liable to become disarranged or broken in operation and has .no delicate adjustments which must be made and maintained. Further, the simplicity of 'its construction enables it to be manufactured ata lowcost. The base and main frame constitute a single casting and there are but few other parts and these parts are of such a character that they require but lit tle machine work.

While I have shown and described one embodiment of the invention it will be understood that this has been chosenv for the purposes of illustration only, and that I do not ldesire to be limited to the details of construction shown and described except as required by the scope of the claims, for obvious modications will occur to a person p skilled in the art,

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is

.1. ln a device of the character described,

contact members, one of which is movable,

an actuating device for said movable contact member comprising a movable member and' a spring-controlled part provided with converging surfaces constituting cams, and a controlling device comprising a pivoted lever arranged to move from one cam surface to the other across the converging ends thereof, said spring normally exerting a force to move said part toward the lever, whereby the movement of the lever from one surface to the other first tensions the spring and then causes the part to exert a` cam action' against the lever to actuate the movable member.

2. In a device of the character described, fixed and movable contact members, an actuating device for said ymovable contact member comprising a movable member and a spring controlled part mounted thereon and provided with converging surfaces constituting cams, a pivoted controlling lever arranged to move 4from one cam surface to the other across the converging ends thereof, said spring normally exerting `a force to move said part toward the controlling lever, whereby ,the movement of the latter from one surface to the other irst tensions the spring and then causes the part to exert a cam action against the controlling lever to actuate the movable member, and stops to definitely limit the movement of the controlling lever in both directions. .Y

3. In a device of the character described, contact members, one of which is movable, an actuating device for 'said movable contact member comprising a movable member and a spring-controlled pivoted part provided with `converging surfaces constituting cams, and a controlling device comprising a pivoted lever arranged to move from one cam surface to the rother across the con-- verging ends thereof, said spring normally the lever, whereby the movement of the lever from one surface to the other first ten# sions the spring and then causes the part to exert a cam action against the ulever to actuate the movable member. l

4. In a device of the character described, contact members, one of which is movable, a pivoted actuating device for said movable contact member, a pivoted controlling device comprising a lever having an end extending towardasaid actuating device, said actuating device comprising a part having cam surfaces converging to an edge adjacent a line drawn through the said pivots and in contact with the end of said lever, v

5. In a device of the character described, contact members, 'one of which is movable, an actuating device for such movable contact member comprising a spring-'actuated part moving said actuating device, a controlling device arranged to engage dierent trolling device with one portion of said part and to hold said controlling device against movement during its engagement with thev other portion of said part. p

'6. In a device of the cliaracter described, iXed and movable contact members, an actuating. device for said movable contact member comprising a pivoted member and a transversely extending lever pivoted thereto on an axis remote from the pivot of said member and provided with a tapered. nose, a spring acting on said lever to move the same away from'the axis oit meni'; r, and a controlling device having a part adapted toy be engaged by dierent sides of said tapered nose when said controlling device is in diderent positions.

7. In a device of the character described, a main frame, a lined Contact carried by said main frame, an actuating device pivotally mounted on said.- rarne, a movable contact operated by said actuating device, a controlling device comprising a lever'A pivote-ily mounted on said frame at a point remote from said actuating device and having` end extending toward the same, said actuating device comprising a spring.- pressed part having converging surfaces isgod oiift, onV opposite sides of a linedravvn 'through the pivots of said devices, said sn ces "te ingadapted to eXert a cam actio against the end of said lever when the ster is moved into dilerent positions, whereby said actuating device is moved or the other.

8. ln a device of the character described a main frame,l a iXed Contact carried by said main frame, 'an actuating device plvotally mounted on said Jrframe, a movable contactv said main frame, an actuating device pivotally mounted on said frame, and a movable Contact operated by said actuating device, said actuating device comprising arm having a recess, a pivoted lever in one direction transversely to said recess, and a spring mounted in said recess and tending to move said lever away from the axis of said arm, said lever having a tapered nose arranged with its apex extending substantially radially of said actuating device, and a controlling device adapted te be engaged by different sides ot said tapered nose when said controlling device is in different positions.

l0. ln a device of the/character described, contact members, one o'which vis moi/able relatively to the other, a pivoted .actuating device for said movable contact member coniprisingk an arm havinDW a longitudinal recess, a pivoted lever extending transversely to said recess and 'tapered nose, and a spring mounted in said recess and acting on sai1 lver to move the same away from the c of said device, and a controlling device 'ng a rpted to be engaged by di nose when said ferent positions.

l1. ln a device ci the character described, contact members, one of which is movable relatively to the other, an actuating device for vsaid movable contact member comprising a spring-actuated part having converging surfaces, a controlling device having a part arranged to be engaged by different surfaces orf said spring-actuated part when said controllingdevice is in dieihent positions, and means on each side of the rconcontrolling device is indife iorsaici movable contact member comprising a spring-actuated partihaving converging surfaces, alcontrolling device having a part arranged to be engaged by different surfaces oi said spring-actuated part when said controlling device is in different positions, and a single pair of stops arranged on opposite si, said devices Jto-limit both movements or said actuating device and of said controlling device.

i3. laa devicev of the character described, a frame, contact member carried by said frame, an actuating device pivoted at one of the corners of A,said frame., a movable contact me; "ated by said actuating device, sa. I; device comprising a sg'iring-actu having converging surfaces, latera` v extending lug carried by said actuating cevice, a controlling lever pivotally mounted at that corner of said frame diag ly opposite the axis of said actuating d@ rice, extending toward said actuating device and having a part arranged to be engaged did'erent suriaces of said spring-actuated part oie said actuating cevice when lever is in different positions, and lugs inwardly from said trent sides of said taperedV frame and arranged in the paths of said lever and of said lug on said actuating dev vice.

14. In a device of the character described, 5 contact members, one of which is movable,

an actuating device "for said movable contact member comprising a pivoted member and a spring-controlled part mounted thereon and provided with converging cam surfaces, a pivoted controlling lever adapted to 10 engage the cam surfaces, and stops arranged in the paths of said pivoted member and controlling lever.

In testimony whereof I afix my signature.

HUGH W. KIMES. 

